Question about 2002 Ford F250 Super Duty SuperCab

2 Answers

Ford f-250 A/C blows Hot Air

After replacing the heater core on the 2001 Ford f-250 powerstroke with 7.3L diesel it blows hot air when the air conditioner is turned on.  I don't know if the problems were related but was wondering if anything i disconnected and re-connected might have caused the problem or if they are separate issues.  To be clear, when the a/c control is turned on the air coming out of the registers is Heated, not just vent air.  Any suggestions to troubleshoot the problem are appreciated.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Ford Master
  • 61,037 Answers

It sounds like you might have left air temp control blend door actuator disconnected, it uses an electric motor to move the door for either hot, cold or a blend of both the heater core and the AC evporator core air flow, it may also just be defective.

Posted on Jan 06, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 367 Answers

I would check the switch and see if it has power or vacuum using a test light or a vacuum gauge I'm not sure if it is vacuum or electrically controlled you can . I would then look under the dash and check the blend door for the heater and a/c vent because that might be stuck open or closed depending on how it works, and see if the motor or vacuum control has power or vacuum.

Posted on Jan 06, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

2002 Ford Taurus, Heater blows cold air?


What have you checked so far ?
Radiator full of coolant ? Heater hoses getting hot ?

Feb 23, 2015 | 2002 Ford Taurus

1 Answer

01 dodge Durango heat isn't blowing hot air


Check hoses to heater core to make sure BOTH are getting hot. If yes, bad blend air door or actuator likely. If no, back flush heater core or replace.

Feb 20, 2015 | 2001 Dodge Durango

1 Answer

Why would I not have heat? 2001 Dodge Ram 3500 truck. motor temp gets to 190 degrees after replacing faulty thermostat. but the heater don't blow hot air. blows cool to warm. everything moves and...


Stacey
sounds like your blower motor is OK so either the hot water is not getting through the heater core, or the air is not being routed across the heater core. If the hoses or core are blocked, that would do it or if an air door is not allowing the air to the core.

Hopefully it won't come to core removal, but this video should illustrate what is going on. There are also videos for unplugging the core. good luck

Jan 08, 2015 | 2001 Dodge Caravan

1 Answer

I have a 1999 merc 250 turbo diesel blowing cold air blower working no hot air how do I fix it


Plz check that heater core is not clogged. If coolant isn't circulating through heater core it may require to be backflushed.

Nov 14, 2013 | Cars & Trucks

2 Answers

2003 f350 diesel no heat


thermostat is sticking open

Dec 25, 2012 | Ford F-350 Cars & Trucks

1 Answer

My S reg ford escort diesel only blows cold air or very luke warm air can you help?


CHECK FOR LOW COOLANT,NOT ENOUGH COOLANT IN THE SYSTEM.IF COOLANT LEVEL OKAY.THERMOSTAT NEED CHANGING STUCK OPEN.IF THERMOSTAT BEEN REPLACED.CHECK BOTH BOTH RADIATOR HOSES AND HEATER CORES HOSES THEY ALL SHOULD BE VERY HOT.IF ALL HOSES HOT AND BOTH HEATER CORES HOSES GOING INTO FIREWALL IS HOT.HEATER DOOR NOT OPEN ALL THE WAY OR STUCK.IF ONE OF THE HEATER HOSES GOING INTO FIREWALL HOT AND OTHER HEATER HOSE COMING OUT OF FIREWALL NOT HOT.MORE LIKELY HEATER CORE PLUGGED NEED TO FLUSH OUT COOLING SYSTEM.FLUSH OUT COOLING SYSTEM IF NOT BEEN DONE IN A LONG WHILE.

Nov 04, 2011 | 1998 Ford Escort

1 Answer

Hot air is blowing cold in my 2001 ford escort flight


check coolant level first. possible bad thermostat, blockage, heater core is bad. check to see if a hose going into heater core is hot, if the hose is hot and the other is cold you have a blockage in heater core. if so, sometimes you can remove the hose from heater core and flush it out with a garden hose. if above fails, flush whole system.

May 10, 2011 | Ford Escort Cars & Trucks

1 Answer

2001 FORD EXPEDITION XLT 4.6L V8 BLOWING MILD WARM BUT NOT WARMING THOROUGHLY. HAVE FLUSHED COOLING SYSTEM THREE TIMES, AND CHANGED THERMOSTAT. HAVE ALSO REMOVED DASH AND REPLACED "BLEND DOOR" AND BLEND...


You hot air comes from the water circulated through the heater core. It is like a miniture radiator with water flowing thru it constantly. So by opening the "Blend Door" you are permitting so much of this hot air to pass thru.

Seems like for some reason your heater core is plugged up. Just like a radiator can be. So water may be passing through your heater core but not passing through fully. Your heater core gets hot from water passing throught it from the engine. Then your doors open up, in proportion to how much air is permitted to pass over the heater core.

Suggest to remove the heater core and replace it. Seems the blend doors are working properly but again, if you have a non working heater core then no air can pass over the "Hot Core" for you to recieve hot air.

If you are not mechanically inclined, then go to a local parts store and you can buy a car manual, such as Chilton's or Hane's Car manuals, for your year and make to show you how to replace it. Then you can also have it for any other problems that may arise.

Jan 24, 2010 | 2000 Ford Expedition

2 Answers

My 99 Blazer won't blow hot air. The Heater core


The problem was a vacuum line leak. Replaced the line.

Dec 30, 2009 | 1999 Chevrolet Blazer

1 Answer

Har heatercore replaced heater blows its just not


1. Low on coolant
2. Air in cooling system
3. Clogged or broken valve leading to core

Dec 03, 2009 | 2001 Ford Taurus

Not finding what you are looking for?
2002 Ford F250 Super Duty SuperCab Logo

Related Topics:

70 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Fordexpert

Level 3 Expert

5331 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...